Belt buckle



FIG. 1 is a front elevational view of the ornamental design for the belt buckle;

FIG. 2 is a side view of the belt buckle shown in FIG. 1 looking from the left side of the belt buckle in FIG. 1;

FIG. 3 is a side view of the belt buckle shown in FIG. 1 looking from the right side of the belt buckle in FIG. 1;

FIG. 4 is a rear elevational view of the belt buckle shown in FIG. 1;

FIG. 5 is a top view of the belt buckle shown in FIG. 1;

FIG. 6 is a bottom view of the belt buckle shown in FIG. 1;

FIG. 7 shows an alternate design of the belt spanner shown in FIG. 1; and,

FIG. 8 shows still another alternate design of the belt spanner shown in FIG. 1. 

The ornamental design for a belt buckle, as shown and described. 